well on my car im pointing at a 88031-16020, at least it looks identical.
and im not sure how its plumbed or what does it do. is it part of the ac?
i cant figure out the vacuum diagram and how this is adjusted. its not mentioned at all in the service manual.

Sorry, are you saying your car has the emissions sticker on the hood but you don't understand it? It should be pretty straightforward, just make sure all the hoses are correctly routed. If you're unsure where one hose ends up, unplug both ends, blow into one of them, and feel to confirm air is coming out the other end.

I'm not sure what that device is for. I don't remember seeing one on any of my T4's.

Based on the part #, you are asking about the "Actuator Set - Idle Up". That is a little different than my 85', I'm not as familiar with my 83' yet. Either way, the vacuum is pulled from tee marked 87690B and plumbed through a solenoid that is either "open" or "closed". Presumably, it is open when the car is initially started and cold enough for it to be needed. It should be pulling temp from a sensor (don't know where), that closes (takes power away) the solenoid valve once warmed up and high idle is not needed.

on some of the cars equipped with an A/C, there is a vac operated device that only is engaged when the a/c is on. it speeds up the idle to prevent it from stalling when at idle. I have seen it twice, one was on a auto trans with a/c. I removed it since it was troublesome, and I just adjusted the idle a bit higher w/o ac, and so it idled okay, without stalling, when the a/c was on. I thought the FSM shows it as an option, or in an inset.

if an a/c was removed from your car, than you can remove it, if that is what it is.

on some of the cars equipped with an A/C, there is a vac operated device that only is engaged when the a/c is on. it speeds up the idle to prevent it from stalling when at idle. I have seen it twice, one was on a auto trans with a/c. I removed it since it was troublesome, and I just adjusted the idle a bit higher w/o ac, and so it idled okay, without stalling, when the a/c was on. I thought the FSM shows it as an option, or in an inset.

if an a/c was removed from your car, than you can remove it, if that is what it is.

I thought that too at first, I've seen one of those A/C idle up devices before too but I don't think this is it. The A/C idle up is located at the front right corner of the carb, and sticks out on its own a bit. It's easy to access. It looks like the thing Erikwi is talking about is located more to the rear right of the carb, and tucked between the carb and the manifold. Looks like a pain to access.

Oh I just read what NWMO posted. Maybe it is the A/C idle up after all, or maybe some kind of auxiliary cold start idle up? Very curious. Boy, all this talk just makes me grateful for how simple the Canadian manual trans emissions stuff was on these cars.

This won't be perfect for your car, but should get enough of the lines headed in the right direction to help. This link takes you to the 85' FSM provided as a PDF. Please continue to ask questions and we will do what we can.

Sorry, are you saying your car has the emissions sticker on the hood but you don't understand it? It should be pretty straightforward, just make sure all the hoses are correctly routed. If you're unsure where one hose ends up, unplug both ends, blow into one of them, and feel to confirm air is coming out the other end.

I'm not sure what that device is for. I don't remember seeing one on any of my T4's.